Gas filtering apparatus

The utility model discloses a gas filtering apparatus which comprises a casing, a gas inlet arranged on the casing, a gas outlet arranged on the casing, a gas filtering rotating drum which is arranged in an inner cavity of the casing between the gas inlet and the gas outlet and is horizontally arranged, and a motor which is arranged on the inner lateral wall or the outer lateral wall of the casing and drives the gas filtering rotating drum. When the filtering apparatus is used for filtration, and a drum body of the partial rotating drum which is stained with harmful substances enters liquid medium again, the drum body of the partial rotating drum can be cleaned by the liquid medium, and filter material stained with the harmful substances is thoroughly cleaned, which avoids the disadvantages that an existing filter requires to be frequently cleaned, or filter material requires to be frequently replaced. In addition, the utility model adopts metal wires as the filter material, the gap is big, the wind resistance is little, the stainless steel metal wires can absorb heat in gas in the filtering process, and the filtering apparatus can lower the temperatue. When the rotating drum rotates, liquid medium is divided and refined, a portion of negative ions can be generated, and the negative ions flow out of the gas outlet, which is good for human health.